Got a pair of 10 speed wheels that you’re really hoping to run with your new 11 speed drivetrain? Before you start taking a grinder to that freehub, there’s another way. Lasco Concept is a machining and welding company out of Montréal, Québec that must have some employees who are into cycling as well. Instead of welding up industrial applications or creating fantastic works of metallic art, Lasco Concept has figured out away to machine an 11 speed cassette in a way that it fits onto a 10 speed freehub body.
While many wheels offer enough room physically between the spokes and the last cog to fit an 11 speed cassette, the 1.8mm difference in freehub width is enough to prevent the newer cassettes from fitting. While some hubs have the ability to swap freewheels and end caps to fit, others may not. That’s where the Lasco Concept cassettes come in.
Complete Shimano Ultegra 6800 11 speed cassettes are available directly from Lasco Concept for $130 + shipping (price may fluctuate based on exchange rate). These cassettes are pre-machined and will fit directly onto 10 speed freehub bodies and are available in 11-25, 11-28, and 11-32t.
However, if you already have an 11 speed cassette that you wish would fit other wheels*, Lasco Concept will machine it for you. For the service, they’ll charge $45 plus an additional $18 to ship it back to you in the U.S (you have to cover shipping to get it there as well). Lasco Concept says the cassettes must have at least a 25t cog or larger as the last cog to ensure it will fit over the hub flange and spokes. The catch is that they’ll only accept Shimano 105 CS-5800, Ultegra CS-6800, and SRAM Force cassettes to machine. Estimated turn around is just 24-48 hours.
And if you’re worried aboutthe cassette fitting on 11 speed freehubs as well, Lasco Concept says to simply use the 11 speed 1.85mm spacer that is included with many 11 speed hubs.
For more details, or to order the cassettes check out their facebook page.